As a former athlete I had to implement powerlifting with a lot of speed, and explosive training! I was training as hardcore and at a elight level as possible! If you are going for just the cardio effects then the more you run, the less your gains will be! But unless you are a top athlete you dont have to worry about your gains as much! If you are running a couple of days a week! Plyometrics and sprint training are great ways to lower your bodyfat while keeping your powerlifting gains! But if you start running, jogging five days a week for extended periods of time your gains will be harder to come by! From the little I know from your post! You could run, jog for a warm-up and cool down before your lifting a couple of days a week! Keep track of your gains and BF! Then according to the results and your goals you can adjust the time and frequency accordingly!